陈列像磨石头、巨树和陨石之类的东西，基本上是靠机械操作的。
Displaying such things as stone heads, giant trees, and meteorites is basically mechanical.
下料斗及筛网架均配有气缸控制系统对机械操作的安全性更有保障。
The next hopper and sieves the wire table to have the air cylinder control system to have the safeguard to the mechanical operation security.
除了改善道路之外，这些方法还提供了关于操作机械车间和公共汽车、卡车服务的培训。
In addition to the improvement of roads, these methods provided training in the operation of a mechanical workshop and bus and truck services.
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